|
Flexure is a problem I really have trouble coming to terms with. Flexure between guide scope and main imaging scope should by all rights be almost nil due to the fact that flexure requires inertia. With a guided telescope moving a grand total of 15 degrees an hour there would be almost no inertia in the direction of travel. Things like cabling and obstructions could add to flexure problems. Flexure in a focuser could well leave a camera sitting with a slight tilt or sag but this would be inherant in all images and would only really become variable as the angle of the focuser/camera change.
To my way of thinking flexure would or could be evident during a slew but when the scope is guiding at sireal it should be almost nil.
Am I wrong in these assumptions. There has been a lot written about flexure but may it be actually other outside stimulus such as missaligned worms, gear imperfections, cable drag or just minor vibrations not related to tube or guidescope flexure?
|